Comment on "Impact of Spatial Correlation on the Performance of Orthogonal Space-Time Block Code"

In [1], Jorswieck and Sezgin presented a theorem on the impact of spatial correlation for orthogonal space-time block codes. The theorem is correct whereas its proof is not. An alternative proof of the theorem is presented in this letter.

[1]  Aydin Sezgin,et al.  Impact of spatial correlation on the performance of orthogonal space-time block codes , 2004, IEEE Communications Letters.

[2]  John G. Proakis,et al.  Digital Communications , 1983 .

[3]  I. S. Gradshteyn.  Table of Integrals, Series and Products, Corrected and Enlarged Edition , 1980 .

[4]  Charles R. Johnson,et al.  Matrix analysis , 1985, Statistical Inference for Engineers and Data Scientists.